Hot-water drum.



W. A. BREWSTER.

HOT WATER DRUM.

APPLICATION FILED MAR. 25, 1911.

1,087,71 7. Patented Feb. 17, 1914.

COLUMBIA PLANOGRAPfl C01, WASHINGTON, n. c.

WILLIAM A. BREWSTER, OF 'WINNIPEG, MANITOBA, CANADA.

HOT-WATER DRUM.

Specification of Letters Patent. Application filed March 25, 1911.

Patented Feb. 17, 1914. Serial No. 616,853.

To all whom it may concern Be it known that I, WILLIAM A. BREW- srnR, a subject of the King of Great Britain, residing at Winnipeg, in the Province of Manitoba, Dominion of Canada, have invented new and useful Improvements in I-Iot-tVater Drums, of which the following is a specification.

This invention relates to hot water drums and particularly to one designed for attachment to a stove pipe.

In hot Water drums of the character hereinabove described it is customary to provide a filling opening, the lower end of which being in line with the uppermost head of the drum, the outer end of the opening being in open communication with the external air. This construction of drum has been seriously objected to owing to the fact that under slight steam pressure the water is forced through such pressure outwardly from the filling opening.

In view of the above it may be briefly stated that the primary object of the present invention is to relieve these objectionable conditions and to provide means whereby the drum cannot be filled with water past a predetermined point and to provide means whereby the water will form a seal in the filling opening and thereby prevent displacement of the water through the opening under certain steam pressure or on the expansion of the water.

In the drawing, the figure represents a side elevation of my improved drum, a part of the drum being in section for the purpose of clearly illustrating the invention.

The drum 1 employed herein as an ex ample for a clear understanding of the invention, is of .well known construction, being provided preferably at each end with a crown 2, from which extends a nipple 3. Adjacent to each crown the boiler is provided with a head 4, the intervening space forming the usual water chamber 5. The construction of the crown portion of the drum is such that a space 6 is formed adjacent to each head, and as illustrated, these spaces are in open communication with the fire tubes 7. These tubes extend throughout the length of the chamber 5 and their end portions are suitably secured in the heads 4. The drum as thus described is designed for the attachment to stove pipe sections 8, as shown. The base of the drum is preferably provided with a supporting frame 9 which may be mounted on the floor or other support through which the flue or stove pipe extends.

In order to prevent the chamber 5 being filled with water past a predetermined point and to prevent the water on expansion or the steam from escaping exteriorly of the drum, I provide a combined filling tube and seal 10 which extends vertically through the uppermost head a of the drum, the lower end of the tube being extended below the plane of the head so that the water line or level will be spaced from the said uppermost head. The said tube 10 is formed at its upper end to provide a relatively large funnel 11. A vent pipe 12 opens into the fun nel near the upper end thereof. The opposite end of the pipe extends through the uppermost head at of the drum and its lower end is disposed in line with the lower end of the tube 10. From this construction it will be seen that when the drum is filled with water up to the lower end of the tube 10 and the pipe 12 no more water will be permitted to enter, as the pressure of air in the portion 13 of the drum will prevent the water from rising past a certain point. Under expansion of the water under certain heat the tendency will be to move upwardly in the funnel as shown in the drawing, thus forming a complete water seal to prevent the escape of steam. By reason of the fact that the seal 10 extends a considerable distance below the head 4, an air space 13 is provided for between the water line and head 4. From this construction it will be noted that upon expansion of the water under certain conditions, the air in space 13 will be compressed and act as a relief therefor, so as to permit the water to rise above the lower end of the tube 10 and thus prevent the water from being forced from within the boiler through the said. tube. It will of course be understood that the construction described is only intended to be used on low pressure boilers. On this action of the water the steam will be positively held against exhausting to the external air and thereby held against evaporation.

I claim The combination with a low pressure boiler having its ends formed to provide crowns and heads, of a combined seal and filling member located at one end of the boiler and including an elongated filling tube and an elongated vent tube, the said tubes being substantially co-extensive in with a relatively large flared mouth and the length and each having one end thereof exouter end of the vent tube opening into the tending through the head and disposed beupper edge of the mouth of the filling tube low the plane of the head so as to provide as and for the purpose described.

5 a water seal to prevent the water from ris- In testimony whereof I afiix my signature 15 ing past a predetermined height and thus in presence of two witnesses. provide an air space between the water line WVILLIAM A. BREWSTER. and said head, the said tubes having their WVitnesses: opposite ends disposed above the crown, the N. M. KEELE, [10 outer end of the filling tube being provided EDGAR PRAIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C. 

